Child-resistant blister package

Abstract

A child-resistant blister card package is disclosed having a plurality of unit package regions for enclosing one unit dosage form, each comprising a cavity and a closure sheet to seal the cavity. Once a unit package region is detached, the corner defined by lines of weakening with perforations can be detached to expose an unsealed area and easily access the content of each unit package region.

1. A child-resistant blister pack defining a plurality of unit package regions wherein each region encloses one unit dosage form, said pack comprising:
 a blister film sheet having unit package regions, wherein each unit package region consist of a cavity and a flange surrounding said cavity, each cavity being adapted to receive a unit dosage form, and a lidding sheet sealed to said flanges of the blister film sheet for enclosing a unit dosage form within each unit package region; 
 said sealed blister sheet and lidding sheet having a first set of lines of weakness extending from side to side of the blister pack, a second set of lines of weakness extending from side to side of the blister pack running transversely in two directions and intersecting with the first lines of weakness, wherein said first and second set of lines of weakness define the inner borders of each unit package region; 
 said sealed blister sheet and lidding sheet having a third set of lines of weakness at the internal corner area of each unit package region, defining a triangular unsealed area along each of said line of weakness wherein the container sheet and enclosure sheet overlap but are not sealed together, and a sealed area along each of said line of weakness wherein the container sheet and enclosure sheet are sealed together at the internal corner of each unit package region;
 whereby, after an individual unit package region is separated, an unsealed area between the blister sheet and lidding sheet is exposed when the third line of weakness is bent, to form a pull tab to detach the lidding sheet. 
 
 
   
   
     2. The child-resistant blister pack as claimed in  claim 1 , wherein the first and second lines of weakness are perpendicular to each other. 
   
   
     3. The child-resistant blister pack as claimed in  claim 1 , wherein the third set of lines of weakness forms a curve at the internal corner of each unit package region. 
   
   
     4. The child-resistant blister pack as claimed in  claim 1 , wherein the pack comprises at least four unit package regions. 
   
   
     5. The child-resistant blister pack as claimed in  claim 1 , wherein each unit package region has a cavity with a depth between 5 and 15 millimeters. 
   
   
     6. The child-resistant blister pack as claimed in  claim 1 , wherein the blister film sheet is opaque. 
   
   
     7. The child-resistant blister pack as claimed in  claim 1 , wherein the blister film sheet is transparent.